#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include<stddef.h>
//struct s1
//{
//	char c1;
//	char c2;
//	int i;
//};
//int main()
//{
//	printf("%d\n", offsetof(struct s1, c1));
//	printf("%d\n", offsetof(struct s1, c2));
//	printf("%d\n", offsetof(struct s1, i));
//	return 0;
//}